var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

var userSocket = {};

app.get('/', function(req, res){
  
  res.sendFile(__dirname + '/index.html');
  });

io.on('connection', function(socket){
    console.log('a user connected');

    socket.on('chat message', function(msg){
      console.log('message: ' + msg);
      io.emit('chat message', msg);
    });

    socket.on('disconnect', function(){
      console.log('user disconnected');
    });
});

http.listen(3000, function(){
  console.log('listening on *:3000');
});
    